How to locate a lost Bluetooth device

The basic operating principle of Bluetooth signals.

Nowadays, many smart devices in daily life use Bluetooth for connectivity, enabling "communication" to transmit information, commands, data, and more. Any device with Bluetooth enabled continuously emits a signal, which is recognized by other devices that support this connection. This is how they send data wirelessly and connect with each other.

When Bluetooth devices are turned on, they can automatically find each other's signals within the allowed range.

Based on that characteristic, some mobile applications allow users to locate lost, hidden, or unidentified Bluetooth devices under two specific conditions: they must be powered on and Bluetooth must be activated.

iPhone users can install free software like Wunderfind on their phones, or choose the Pro version with more advanced features. Other free apps with similar functionality often have many ads obscuring the interface or constantly suggest purchasing subscription packages. Android also has this software, but there haven't been any updates since 2022, and compatibility is lower. Therefore, Android users can try UFind, which offers a similar experience to Wunderfind.

How to find a lost or hidden device using Bluetooth.

After installing the suggested software above, or another program suitable for your needs, you need to have Bluetooth enabled on your phone. Opening the application will request certain permissions, including permission to use Bluetooth. Next, the software interface will display a list of devices emitting signals that your phone can detect.

Along with displaying the name, the software also shows the estimated distance from the phone's location to the Bluetooth device being searched for. The distance number will change in real time as the user holds the phone and moves.

The indicator showing the user's proximity to or distance from the device they are looking for will be displayed in real time as they move their phone.

To view more detailed information about a specific device, select its display name, indicated by an arrow ( > ). Here, the interface will show more details and guide the user to continue moving around while holding the phone, monitoring changes on the screen to see if they are heading in the right direction to get closer to the device they are looking for.

As you get closer, the displayed signal will increase and reach nearly 100% (the closer to 100%, the closer you are to the object you are looking for), or indicate that the distance is close to 0 meters. Conversely, the further you go, the lower the percentage will be, or the distance measured in meters will increase.

If an unidentified device appears, or you've tried everything and still can't find or get closer to it, it's likely that the Bluetooth device is located in a neighbor's house or the office next door.

Source: https://thanhnien.vn/cach-dinh-vi-de-tim-thiet-bi-co-bluetooth-that-lac-185250117124657166.htm